#include <iostream>
#include <iomanip>

int main() {
    double value = 4.0;
    std::cout << "value in default format is " << std::setprecision(10) << value << std::endl;
    std::cout << "value in fixed format is " << std::fixed << std::setprecision(10) << value << std::endl;

	return 0;
}